55172434868 has 24 divisors (see below), whose sum is σ = 101641272768. Its totient is φ = 26153300096.

The previous prime is 55172434789. The next prime is 55172434879. The reversal of 55172434868 is 86843427155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643146 + ... + 2663937.

It is an arithmetic number, because the mean of its divisors is an integer number (4235053032).

Almost surely, 2^55172434868 is an apocalyptic number.

It is an amenable number.

55172434868 is a deficient number, since it is larger than the sum of its proper divisors (46468837900).

55172434868 is a wasteful number, since it uses less digits than its factorization.

55172434868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307223 (or 5307221 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 53.

The spelling of 55172434868 in words is "fifty-five billion, one hundred seventy-two million, four hundred thirty-four thousand, eight hundred sixty-eight".